Synthesis of ZIF-7/chitosan mixed-matrix membranes with improved separation performance of water/ethanol mixtures

CO2 Selective, Zeolitic Imidazolate Framework-7 Based Polymer Composite Mixed-Matrix Membranes

“…Initial weight loss was due to the evaporation of DMF solvent present in ZIF-7 cages and the final weight loss was due to the decomposition of ZIF-7 to zinc oxide. TGA curves obtained in this work matches well with the earlier reports (Kang et al, 2013). Vol.…”

“…confirm the presence of ZIF-7 and were in good agreement with the literature reports (Tu et al, 2014;Maythalony et al, 2017;Kang et al, 2013) Figure 3 and Figure 4 show the thermogravimetric analysis (TGA) curves of pure ZIF-7 particles, pristine PANr-PEGMA67 polymer and MMM-20, 30 and 40 % particle loaded samples. In Figure 3 a two-step weight loss was observed, an initial and final weight loss of 13.1% and 62.5% at 250°C and 500-600°C respectively.…”

“…The wide-angle XRD (WXRD) has a broad 2θ peak observed near 18° but due to the amorphous nature of the polymer, no sharp peaks were detected. The structural data of synthesized pure ZIF-7 by powder X-ray diffraction (PXRD) was in good agreement with the reported values (Maythalony et al, 2017;Kang et al, 2013). In Figure 1 the angles of diffracted peaks of the samples MMM-20, 30 and 40 series were shifted to broader angles when compared with virgin ZIF-7 particles.…”

Pervaporation and membrane reactor performance of polyimide based mixed matrix membranes containing MOF HKUST-1

“…Regarding PV, a limited number of studies with MOFs have been carried out. Using zeolitic-imidazolate frameworks (ZIFs), specifically ZIF-7 embedded in a chitosan polymer matrix with 5 wt% MOF loading, the water/ethanol separation factor was reported to be 19 times higher than that of the pure polymer (Kang et al, 2013). ZIF-90/polyimide P84 MMMs with different MOF loadings have been prepared for the dehydration of isopropanol (Hua et al, 2014).…”

Poly(vinyl alcohol)/ZIF‐8‐NH2 mixed matrix membranes for ethanol dehydration via pervaporation

“…37,38 Zeolitic imidazolate framework (ZIF) material, as one promising nanofiller in the membrane matrix, is a subfamily of metal organic frameworks, and possesses tunable structures and favorable affinity with the polymer matrix as compared with most other traditional inorganic particles with rigid frameworks. 39,40 It is, and therefore, considered as one promising nanofiller to be incorporated into the polymer matrix, 41,42 such as polymethylphenylsioxane, 18 polydimethylsiloxane (PDMS), 43 chitosan, 44 PVA, 45 polybenzimidazole, 46,47 polyether-blockamide, 48 polysulfone (PS), 49,50 polyimide, 51,52 and polymerizable room temperature ionic liquid. 53 The incorporation of ZIF can significantly improve the separation performance and mechanical properties of the membrane.…”